Fitting the vapour pressures of solid and liquid iron from the NIST-JANAF database. The two fitted p^vap (T) curves intersect at 1824 K which is close to the known melting point of 1809 K according to NIST-JANAF. The modelwill automatically give preference to the phase with the lower vapour pressure. Solid data exist between 100 and 2200 K, and liquid data between 298 and 4000 K. The solid curve shoots upward for T > 2500 K, but this does not matter as iron condenses as a liquid at those temperatures. When designing our solid Fe vapour pressure p^vap (T)-fit, we just haveto make sure that is does not produce a second, spurious intersection point with the liquid curve.